Mortising machine



Jan. 8, 1929.

2 sheets-sheet Filed Aug. 2l, 1924 Jan. 8, 1929.

v w. E. RANNEY MORTIS ING MACHINE Filed Aug. 2l, 1924 2 Sheets-Sheet Patented Jan. 8, 1929.

VILLIAM E. RANNEY, 0F COLUMBUS, OHIO, ASSIGNOR TO THE PERFECTION MORTISEB ice. L

COMPANY,` OF COLUMBUS, OHIO, A CORPORATION OF OIIIO. l i

MORTISING MACHINE.

Application sled august '21, 1924. serai No. 733,436..

the provision of a mortising machine where-Y in the wood cutting bit is operated by means of an electric motor, by means of which the output of .the machine is materially increased over the ordinary type of hand operating machine, less' labor required in effectin` its o aeration and control and wherein the construction of the machine is greatly simplified by the elimination of the many trains of mechanisms involved in the ordinary hand type of machine.

A further object fof the invention resides `in the provision of a motor for effecting the operation of the cutting bit of the machine and in theV provision of an improved hand regulated means by means of which the oscillatory motion of the bit is control-led' and the infeed movement of thebit governed.

Llith these and vother objects in view, as

lwill appear as the description' proceeds, the` invention consistsm thegnovel features of construction, combinations of elements and arrangements of parts hereinafter to be fully described and pointed vout in the appended claims. d f

In the drawings: o y l Figure 1 is a side elevation of my improved mortising machine,v

Figure 2 is a vertical section taken through the machine on line 2-2 of Figure 1,

Figure 3 is a top plan view, and

VFigure 4 is a vertical sec-tion `on the lineV @1 -4c of Figure l.

Referring more'particularly to the details of the invention the numeral 1 designates an improved mortising machine inv its entirety. This machine comprises broadly a frame 2, a carriage 8 mounted on the frame for longitudinal travel, an electric operating motor 4, a bit 5, and means of a manually operated character for governing the oscillation of the bit and the infeeding movement thereof.

The frame consists of a channel shaped lower section 7 which is arranged to fit over the edge of a door sash as disclosed in Figures 1 and 2. The side walls of the section 7 are provided at their opposite ends Iwith threaded openings for the reception of clamping screws 8, Wl1ich are adapted to press on the opposite sides of the door to rigidly retain the frame 2 in an operative position of application on the door.

section 7 are rods 9, which have their outer im Extending` perpendicularly from the lower ends united by means of a 4transverse cross piece 10. frame substantially rectangular and provides va frame of all needed strength and dura bility to carry out the `successful use of the 'machineA Mounted upon the .rods 9 for longitudinal adjustment thereon is a travelling carriage 11. This carriage has its ends= formed with sleeve shaped extensions 12 having bores provided therein for the recep- -tion of t-he rods 9. By means of this construction the carriage is permitted to traverse the frame longitudinally but is restrained from rotation or undue ieXing. Between the sleeves 12the carriage is formed to include outwardly` bowed or curved side Walls l13 betweenuwhich is positioned the operating motor 4. The frame of this motor is surrounded'bya collar 1 4, and trunni'on pins or studs 15 are arranged to project into registering openings provided in said collar and formed in the side walls 13 of the carriage. This construction serves to securely .i

retain the motor Within the carriage but admits of rocking or oscillatory movement on the part of the motor With respect to the carriage. The lower end of the motor has it-s armature shaft 16 formed Vwith a chuck 17 adapted for the removable "reception of a cuttingv bit 18, which is rotated by thek motor for the purpose of producing the necessary cutting action.

In order to oscillate the motor back and forth so that its associated cutting bit Will be given the desired range of travel necessary in producing a mortise socket, the side walls 13 of the carriage are extended' to provide bearing' sleeves 19, in which is journaled for rotation a transverselyextending operating shaft 20. This shaft is equipped withl a manually operated crank 21 by means of which the shaft may be conveniently rotated by the operator. The other end of the shaft is provided with a shortcrank 22 havin@ a. longitudinal `groo-ve 23 in itsouter face. Y rranged to be locked in any position throughout the length of the groove 23 is a slidable This construction renders the link 25, having its other or inner end pivot- 1 ally connected as at 26 with an upstandingarm 2T integrally formed with the collar 14.

' length.

It will be seen that by the rotation of .the

shaft`20 the crank and link Connection asso- Y ciated therewith will result in the oscillationv of the motor 4 and the consequent oscillation of the cutting bit. Also, it will be obvious that by adjusting'the positionv of the block 24 within the crank 22 the throw of said i' crank may be readily governethtlius enabling the bit to produce iiioitises of varying In the event that the block is positionedA in registration 4with the' operating shaft 20, oscillation ot the motor willbe prevented so lthat the bit may be employed or'drilling straight holes. The motor 4 is of the ordinary electric type standard in handvdrills andl isl adaptedto Voperate Von ordinary voltages asv are common in house circuits. `V f' I l To govern the infeeding movement of vthe bit thereA is provided a feeding screw 28. This screw has its threaded shank received loosely within an y'opening 29 provided in the cross piece Vl0 ofthe lframe. spring Ipressed plunger 30 is mounted in connection with said cross piece and has its inner end normally projected into the threads of the screwY 28. By pressing `the plunger' outwardly the screw will be relieved from engagementV with the 'frame 2, thereby permitting the carriage to be lquickly adjusted withrespec't to said frame. Upon release of the plunger the latter will assume. its'normalV A position serving in the capacity of nut for the screw.

The lower end of ,the screw is swiveled in connection with the carriage 3, as indicatedat 3l, so that when the screw is rotated the carriage may be moved longitudinally of the frame. To effect the rotation of this screw it isV necessarymeiely to pro-V Yvide the operating shaft 2O with a beveled gear32 nieshingwith a similar gear 33 provided ony the lower end of the screw shaft.

Thus as thc-motor is ocillated through the rotation of the shaft 20, the screw l28 will be rot-ated to advance the bit on its infeeding movement. i l Y In view of the foregoing description, taken in coiinect-ion with the accompanying drawings, it willbe seen that there is provided a inortising machine consisting ot but few and simple parts, readily controlled and wherein the mechanical complication so largely presf ent iii-hand operated machines Vhas'been eliminated. This is done in order to provide a practical machine for everyday work, one

lthat can be readilyv keptin operative condition, and further of such design as to be capable or" performing the operation of producing a inortise at a cost materially lowerthan by any other mea-ns of which I am aware.

What is claimed is: f

' 1. In a inortising machine, alframe, a carriage mounted on said frame to traverse the latter longitudinally, a motorpivotally mounted upon said carriage, al cutting bitk connection between the crank and motor by meansjof which the motor is oscillated'upon rotation of said crank, and means for effecting longitudinal travel ofthe carriage upon said frame during the rotation of saidcrank.

In testimony whereof I affixmy signature.

' WILLIAM nRANNEY. 

